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How much before heads blow?

2K views 27 replies 12 participants last post by  rageingbull 
#1 · (Edited)
My brother sold me his 99 F-350 4x4 PSD and got a 05 F-250 4x4 6.0L CC SRW automatic. He is wondering how much he can mod it without blowing the head gaskets. This truck is stock with 50K on it. He is looking at either a 4" or 5" exhaust with cat and muffler delete and a AFE Stage 2 intake. He likes the SCT Livewire for the tuner and gauges but isn't sure if it will be too much for the stock engine with preloaded tunes and how much custom tunes he could add without fear of damage. Any advice from some of you 6.0 folks would sure be appreciated and I'm sure he will looking here first chance he gets.
 
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